Kate Middleton is a royally good sport. The Princess of Wales once cracked a joke after being mistaken for her husband Prince William’s employee. While visiting the Shire Hall Care Home in Cardiff, Wales, in August 2020, resident Joan Drew-Smith asked the Prince of Wales, “Is that your assistant?”  In 2020, Kate Middleton was mistaken for Prince William’s assistant by a resident at Shire Hall Care Home in Cardiff, Wales (as pictured here). Getty Images Middleton playfully responded by telling William, “Well, I am your assistant. I have been for a long time!” Getty Images Middleton cheekily told her partner, “Well, I am your assistant. I have been for a long time!” She, notably, has been married to William since May 2011 — and in a relationship with him since 2003.…